Furnace attachment



J. cUsENzA l FURNACE ATTACHMENT Filed Feb. Q 1928 Jan. 8, 1929.

Patented Jan. 8, 1929.

JOSEPH CUSENZA, OFDETROIT, MICHIGAN.

apta,

FUR-NACE ATTACHMENT.

Application filed vebruary 9, 1928. v Serial No. 252,965.

My invention relates to a new and useful` appear from the descriptiongiven.

` mined An object of the present invention is to provide a most efhcientfurnace which is used for heating purposes, either in power plants orfor heating dwellings, buildings andthe like, and to provide a furnacein which al minimum amount of fuel will be consumed.

Another object of the invention is the provision of a device whereby aquantity of steam and air may be led into the Afurnace for combustionpurposes and for assisting in the combustion of the fuel ordinarilyburned therein.

Another object of the invention is the provision of a releasevalveadapted for settingl the device into operation upon the developingof steam in the reservoir to a predeterressure.

Anot er obj ect of the invention is the provision of a device of thisclass which will be The invention will be best understood by a referenceto the accompanying drawings which forma part of this specification andin which,

1 is a side elevational view of the invention showing it installed in afurnace,

which is shown in fragment. y p

Fig. 2 is a top plan view of the invention showing it installed in afurnace.y

Fig. 3 is f an enlarged fragmentary sectional view of a part of thedevice,

Fig. 4 is a central sectional view of a valve used in the invention.

In the drawings I have illustrated the device mounted on a furnacehaving a front wall 7 a side wall 8 and a grate 9 and-provided With hotwater pipes 10 which are normally positioned above the level 11 ofthebed of coals. These pipes 10 are suc-h as are commonly found in hotair, steam and hot water furnaces, and serve the purpose of supplyinghot Water to the hot4 water tank. They of themselves form no part of theinvention, but are shown to illustrate the method of mount; ing theinvention.

The pipe 12 which is connected to a suitable source of water supply,such as the city supply under pressure, is connectedthrough the valve13and the pipes 14, 15, 16anol 17 to the pipe118 which extends inwardly ofthe furnace and is connected in communication with the large pipe 19,thispipe 19 being contate nected by the return 20 to the pipe21 whichconnects through thel return 22 the pipe 23, the return 24 to thereservoir 25. An .outlet pipe 26 connected to this reservoir,

passes through the pressure pop valve 27,

this valve being regulated to open upon the building of a predeterminedpressure in the reservoir 25. A T 28 is in communication with the popvalve 27 and also with the pipe 29 which communicates with the pipe 30projected inwardly of the furnace .below vthe grate 9 and provided atits end with a nozzle 31 having aflattened end 32. ,Connecting .with theT 28 is a small pipe 33 which is threaded into the head 34 which ismounted in the pipe 35. A pocket V36is formed in the head 34, leadingoutwardly from which and extending axially of the pipe 35 is a tube 37.A screw 38 is threaded in the head 34 and serves as a needle valveoperating in the rend of the tube 37. This vpipe 35 is projectedinwardly of the furnace, suitable nuts 39 and 40 being adapted to clampthe front wall 7.

The pipe 35 is projected inwardly of the fur-y 17 and 18 lead, is a pipe46 provided with a stop cock 47 Plates 48 and 49 cooperating withsuitablebolts 50 are' used to secure the pipe 19 upon the hot waterpipes 10, the pipe l19 being offset asat 50, to bringvthe major portionofthe length of the between the pipes 10.

rIlle valve 13 is provided with a plug 51 having a valve -seattherein inwhich engages theV end of the screw or needle valve 52k which threadsinto the block 53 screwed in-t-o the shell of the valve I13, thusaording a -means for regulatingthe amount of water which. may flowfrom'the source of supply through the pipe 12 into the pipe 19.

' In operation, after the bed of coals has been placed on the grate 9and ignited, the valve 47 is opened to permit the escape of such surpluswater as may have collected the heating;

pipex19 to liey coils consisting of the pipe-19, the returns 20,

21 and 24, and the pipes 21 and 23, as well as the reservoir 25. Thevalve 47 is then closed and the needle Valve 52 opened sufficientlysufficiently to open the valve 27, this superlyy of the pipe 35 sets upa vacuum, air will i heated steam wil'lpass 'through the pipes 29 and 30outwardly from thelattened end 32' of the nozzle 31 and thence upwardlythrough the burning coals on the grate. At the same time, asmall'quantity of the steam will pass through the pipe' 33 into the'pocket 36 tlfirough the tube 37 and outwardly through the perforations44.` As this steam travelling through the tube 37 which is positionedaxialbe drawn in through the opening 54, so that the steam andv air willcommingle in the pipe 35.. The pipe yy is not spot welded tothecup-shaped member 43 around its entire periphery, but atseparatedpoints, preferably three or four in number. heated gas from the interiorof the furnace will also be drawn intothe cup-shaped memberl 43, andthis heated gas, ltogether with the air and the small quantityolf-steamwhich passes through the tube`37 will be expelled through theperforations 44. This steam and airwi'll assist combustion of theV gaseswhich rise from the bed of coals, and the superheated steam expelledfrom the nozzle when brought into' contact with the bur-ning coals willbe b-roken'up into its constituent gases and burned. This operationwill' continue so long as the pressure in the coils and reservoirt25 andthe pipe 26 is su-ii'cientfto maintain the valvey 27 in open condition.lt is desirable that this valve 27' be set to ope-n at afpressureslightly less than the pressure of the water supply in the pipe 12. Inmany cities this water supply pressure is but twenty-five pounds, and insuch case it would bepreferable to have the valve27 set to open upon abuilding up of a pressure of approximately twenty pounds, so that abacking up of the water into the water supply pipes could not taleplace.

the. superhe'ated With a device constructed in this mannerk aconsiderable savingl of fuel is effec-ted as the gases-provided by` thesteam which is delivered into the bed of coals forms a considerablepart-of the heating function desired. Underv normal conditions thedevicewill continue to operate and eject from the nozzle 31 coals on-the grate9; are of' combustible quality,` that is, luntil the bed of: coals hasbeen f burned, in which* event the valve 27, upon the loweringV of thepressure below the pre- Consequently, the

steamso longasthe bed of one which is very easily and quickly installedoni a furnace already built, and very easily built into a furnace in thecourse of its manufacture. Thel durability and simplicity of the deviceis believed evident from the description, and experience has'` proven,after repeated tests,` the eiiiciency of they structure and tlie economyresulting; from its operation.

After operation llas: ceased and prior to generating steam i-n thereservoir and heating coils there is built up a pressureof over therequired amount to open the valve,` the water which is in the reservoirand heatingcoils and which. will berforced from the nozzle` will bedeposited in the ash pit below the gra-tes and the live coals in no,serious mann-er affected.

Vhile l have illustrated and described the preferred form of myinvention, I do: not wish to limit myself to the precise details oaistructure shown, but desire to avail myself of. such variations andmodifications as come-within the sco-pe ofthe appended claims.

Having thus described my invention what v l claim as new anddesiretosecu-reby Letters Patent is:

1. A device of the class described adapted forV use on 'a furnace,having a combustion chamber and gratespositioned below said combustionchamber,y comprising: heating coils extended into said combustionchamber; means for delivering water toV said heating coils; a nozzlepositioned below said grate; and valve automatically establishingcommunication between said nozzle and said heating coils upon buildingup of predetermined pressure in said heating coils.

2. A device of the class described adapted for use with a furnace havinga combustion chamber and grates: positioned therebelow, comprisingheating coils in said combustion chamber; means for.y delivering liquidto.- said heating coils; a nozzle positioned to discharge below saidgrate; means for connect-V ing said nozzletofsaid heating coil; a valveinterposedbetween said nozzle said heating coil for controlling sai-:dcommunication, said Valve being automatically opened upon building' upof a predetermined pressure in said heating coils.

3. A device of he class described adapted for use with a furnace havinga combustion chamberv in cem-munication with said heating coils;meansfor delivering liquid to said heatingV coils aconduit',communicating with said reservoir; a` nozzle communicating withsaid conduit and adapted for discharging into said furnace below thecoals on said grate;

and a valve interposed between said conduit and said nozzle andautomatically operable for establishing communication between saidnozzle and said conduit, upon building up of a predetermined pressure insaid reservoir.

4. A device of the class described adapted for use with a furnace havinga combustion chamber and grates positioned therebelow, comprising:heating coils in said combustion chamber; .a reservoir in saidcombustion chamber in communication with said heating coils; means fordelivering liquid to said heating coils; a conduit communicating withsaid reservoir; a nozzle communicating with said conduit and adapted fordischarging into said furnace below the coals on said grate; a valveinterposed between said conduit and said nozzle and automaticallyoperable for establishing communication between said nozzle and saidconduit, upon building up of a predetermined pressure in said reservoir;a

' pipe extending Ainwardly of said combustion chamber' and opening atits outer end to the atmosphere; an axially positioned tube in saidpipe; a by pass for communicating said tube with said conduit uponopening of said valve; and a perforated sleeve engaging the inner end ofsaid pipe, said inner end being open and discharging into said sleeve.

5.- A device of thel class described adapted for use with a furnacehaving a combustion chamber and a grate positioned therebelow,comprising: heating coils positioned in said combustion chamber; anozzle communicating with said heating coils and adapted to dischargebelow the coals on said grate into said furnace; means for deliveringliquid to said heating coils; a valve positioned between said nozzle andsaid heating coils and automatically establishing communicationtherebetween upon buildingup of a predetermined pressure in said heatingcoils; means projecting into said combustion-chamber and communicatingwith the atmosphere; and means for setting up an induced draft throughsaid last named communicating means upon the opening of said valve.

6. A device of the class described adapted for use with a furnace havinga combustion chamber and grat-es positioned therebelow,

munication; upon building` up of a predetermined pressure in saidreservoir; a pipe projecting inwardly of said combustion chamber andcommunicating at its outer end with the atmosphere; and means operableupon the opening of said valve for effecting an induced draft inwardlyof said pipe.

7 A device ofthe class described adapted for use with a furnace having acombustion chamber and grates positioned therebelow, comprising: heatingcoils in said combustion chamber; means for delivering liquid to saidheating coils; a reservoir in communication with said heating coils; aconduit communi-V cat-ing with said reservoir and extending eX- teriorlyof said furnace; a nozzle communieating with said conduit and adapted todischarge into said furnace below the coals positioned on said grate; avalve interposed in said conduit for controlling communication betweensaid nozzle and said reservoir and automatically operable to establishsaid communication; upon building up of a predetermined pressure in saidreservoir; a pipe projecting inwardly of said combustion chamber andcommunicating at its outer end with the atmosphere; a tubular memberextending axially of said pipe; a by pass connecting said `tubularmember with said conduit; rsaid tubular member conducting steam underpressure upon opening of said valve into said pipe for effecting-aninduced, inwardly directed draft; and a perforated cup-shaped memberembracing the inner end of said pipe.

In testimony whereof I have signed thev foregoing specification. Y f

rosari-r cosenza.

